1566 Icarus (1949 MA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8270057286 ± 2.08e-08
Semi-major axis (a)1.0780378356 AU ± 7.96e-10
Inclination (i)22.80322165° ± 4.67e-06
Long. of Asc. Node (Ω)87.95241860° ± 1.45e-06
Arg. of Perihelion (ω)31.43821085° ± 2.76e-06
Mean Anomaly (M)153.07893635° ± 3.50e-06
Mean Motion (n)0.8805646990°/day ± 9.75e-10
Perihelion dist (q)0.18649437 AU ± 2.24e-08
Aphelion dist (Q)1.96958130 AU ± 2.25e-08
Orbital Period1.11931160 yr ± 1.24e-09
NGA Modelr2
A2-4.25335087e-15 ± 1.75e-16 AU/d²
Physical Parameters
H (abs. magnitude)16.53
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.450″
Uncertainty0
Orbit TypeApollo
MOID0.033646 AU
Observations Used1864
Radar Obs Used23
Gaia Obs Used31
Oppositions7
Arc Total1949-2025
First Observation Used1949-06-27
Last Observation Used2025-08-18
Observations (2297)
Date Type RA Dec Mag Band Observatory
2022-06-11 07:42:20 C 21 30 19.241 -29 45 37.98 V W68
2022-06-11 07:46:20 C 21 30 19.001 -29 45 42.44 V W68
2022-06-11 07:53:35 C 21 30 18.626 -29 45 47.27 V W68
2022-06-11 08:01:56 C 21 30 18.158 -29 45 54.36 V W68
2022-06-12 08:03:38 C 21 29 03.144 -30 06 47.63 V W68
2022-06-12 08:11:09 C 21 29 02.587 -30 06 53.93 V W68
2022-06-12 08:21:32 C 21 29 02.033 -30 07 03.58 V W68
2022-06-12 08:25:58 C 21 29 01.790 -30 07 07.28 V W68
2022-06-12 10:54:38 C 21 28 53.814 -30 09 24.95 V I52
2022-06-12 10:58:34 C 21 28 53.605 -30 09 28.08 V I52
2022-06-12 11:02:29 C 21 28 53.371 -30 09 32.04 V I52
2022-06-12 11:06:23 C 21 28 53.159 -30 09 35.50 V I52
2022-06-27 02:48:12 C 21 01 11.554 -35 42 49.39 V M22
2022-06-27 02:52:08 C 21 01 11.134 -35 42 52.85 V M22
2022-06-27 03:42:35 C 21 01 05.710 -35 43 41.95 V M22
2022-06-27 04:25:20 C 21 01 01.164 -35 44 23.35 V M22
2022-06-28 10:46:34 C 20 57 46.541 -36 14 03.87 U F52
2022-06-28 11:00:26 C 20 57 44.989 -36 14 17.44 U F52
2022-06-28 11:14:17 C 20 57 43.430 -36 14 31.03 U F52
2022-07-03 04:58:06 C 20 44 18.996 -38 02 27.82 V W68
2022-07-03 05:02:01 C 20 44 18.398 -38 02 32.03 V W68
2022-07-03 05:09:11 C 20 44 17.518 -38 02 38.94 V W68
2022-07-03 05:26:53 C 20 44 15.233 -38 02 55.32 V W68
2022-07-04 04:14:47 C 20 41 21.034 -38 23 46.28 V W68
2022-07-04 04:18:44 C 20 41 20.510 -38 23 50.06 V W68
2022-07-04 04:23:19 C 20 41 19.915 -38 23 54.06 V W68
2022-07-04 04:46:47 C 20 41 16.865 -38 24 15.70 V W68
2022-07-05 06:39:33 C 20 37 53.575 -38 47 30.84 V W68
2022-07-05 06:43:57 C 20 37 52.973 -38 47 33.97 V W68
2022-07-05 06:54:10 C 20 37 51.588 -38 47 43.40 V W68
2022-07-05 07:35:04 C 20 37 46.080 -38 48 19.62 V W68
2022-07-06 10:25:34 C 20 34 09.766 -39 11 49.49 V W68
2022-07-06 10:29:56 C 20 34 09.178 -39 11 52.94 V W68
2022-07-06 10:34:18 C 20 34 08.527 -39 11 56.76 V W68
2022-07-06 10:38:37 C 20 34 07.913 -39 12 00.04 V W68
2022-07-09 06:06:43 C 20 24 44.138 -40 08 19.14 V W68
2022-07-09 06:11:02 C 20 24 43.517 -40 08 22.99 V W68
2022-07-09 06:19:59 C 20 24 42.223 -40 08 30.41 V W68
2022-07-09 06:34:17 C 20 24 40.159 -40 08 41.39 V W68
2022-07-17 20:16:54 C 19 53 46.063 -42 27 17.17 V M22
2022-07-17 20:20:54 C 19 53 45.367 -42 27 19.84 V M22
2022-07-17 20:28:56 C 19 53 44.143 -42 27 24.08 V M22
2022-07-17 20:40:46 C 19 53 42.254 -42 27 30.24 V M22
2022-07-23 09:04:47 C 19 33 17.745 -43 25 23.01 U F52
2022-07-23 09:15:46 C 19 33 16.039 -43 25 26.80 U F52
2022-07-23 09:26:46 C 19 33 14.328 -43 25 30.48 U F52
2022-07-23 09:37:46 C 19 33 12.614 -43 25 34.28 U F52
2022-07-24 05:05:49 C 19 30 15.238 -43 31 45.98 V W68
2022-07-24 05:09:45 C 19 30 14.616 -43 31 46.99 V W68
2022-07-24 05:18:16 C 19 30 13.330 -43 31 49.62 V W68
Radar Observations (40)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1968-06-14 05:30:00 115417.1 3 Hz 2388 -14 -13
1968-06-14 19:00:00 50487.7 4 Hz 7840 -2 -2
1968-06-14 22:20:00 -10324.1 3 Hz 2388 -14 -13
1968-06-14.229167 11541710 100 Hz 2388 252 253
1968-06-14.791667 5048770 400 Hz 7840 254 254
1968-06-14.930556 -1032410 100 Hz 2388 252 253
1968-06-15 03:00:00 -167331.6 4 Hz 7840 -2 -2
1968-06-15 04:30:00 -61207.2 3 Hz 2388 -14 -13
1968-06-15 09:40:00 -104441.9 3 Hz 2388 -14 -13
1968-06-15.125000 -16733160 400 Hz 7840 254 254
1968-06-15.187500 -6120720 100 Hz 2388 252 253
1968-06-15.402778 -10444190 100 Hz 2388 252 253
1968-06-16 01:40:00 -202453.5 3 Hz 2388 -14 -13
1968-06-16 06:30:00 -234710 3 Hz 2388 -14 -13
1968-06-16 10:00:00 -255404.7 3 Hz 2388 -14 -13
1968-06-16.069444 -20245350 100 Hz 2388 252 253
1968-06-16.270833 -23471000 100 Hz 2388 252 253
1968-06-16.416667 -25540470 100 Hz 2388 252 253
1996-06-08 14:00:00 560070 10 Hz 8510 -14 -14
1996-06-08.583333 56007000 1000 Hz 8510 253 253
1996-06-10 14:00:00 153114 10 Hz 8510 -14 -14
1996-06-10.583333 15311400 1000 Hz 8510 253 253
2015-06-13 23:50:00 1123284.559 5 Hz 8560 -14 -14
2015-06-14 00:30:00 70583814.78 20 us 8560 -14 -14
2015-06-14 01:10:00 70272229.12 3 us 8560 -14 -14
2015-06-14 23:30:00 822302.025 5 Hz 8560 -14 -14
2015-06-15 00:00:00 60903291.94 2.5 us 8560 -14 -14
2015-06-16 23:20:00 53984215.88 2.5 us 8560 -14 -14
2015-06-18 00:02:00 58591220.063 0.4 us 2380 -1 -1
2015-06-18 00:58:00 58866141.404 0.4 us 2380 -1 -1
2015-06-18 23:41:00 67308377.46 1 us 2380 -1 -1
2015-06-18.001389 585912200630 4000 us 2380 251 251
2015-06-18.040278 588661414040 4000 us 2380 251 251
2015-06-18.986806 673083774600 10000 us 2380 251 251
2015-06-19 01:37:00 68163275.576 1 us 2380 -1 -1
2015-06-19.067361 681632755760 10000 us 2380 251 251
2015-06-20 00:58:00 79708409.313 2 us 2380 -1 -1
2015-06-20 01:33:00 80022300.658 2 us 2380 -1 -1
2015-06-20.040278 797084093130 20000 us 2380 251 251
2015-06-20.064583 800223006580 20000 us 2380 251 251
Station codes
-14 DSS-14 Goldstone (70-m) -13 DSS-13 Goldstone (34-m) -2 Haystack (37-m) -1 Arecibo (305-m, 1963–2020)